Run: 2026-07-01-01KWE9WBJB5QS0G5QPCNWD8AM8

Run Details

Model:
Claude Sonnet 5 (Reasoning, Low)
Test:
N-Length Sentences
Scenario:
Write sentences with 5 words each
Duration:
15.1s
Cost:
$0.014340
Provider:
Amazon Bedrock

Evaluation summary

Score Evaluator
Details Link
100.00% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 5 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Rain fell hard on Thornwood. The old manor stood silent. Every window glowed faint yellow. Detective Marsh arrived after midnight. His coat dripped onto stone. A butler waited near door. His eyes betrayed silent fear. Something was wrong inside tonight. The house's lady had vanished. Marsh stepped inside without hesitation. A scream echoed through darkness. Then silence swallowed the manor.
created_at"2026-07-01T07:39:16.438Z" 7/1/2026, 7:39:16 AM
model"anthropic/claude-sonnet-5-20260630"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4303
moderation_latency130
generation_time14981
tokens_prompt46
tokens_completion190
native_tokens_prompt60
native_tokens_completion1422
native_tokens_completion_images(null)
native_tokens_reasoning91
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
num_fetches(null)
web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"end_turn"
service_tier"default"
usage0.01434
router(null)
provider_responses
0
endpoint_id"37b16f45-eeae-45f3-9b85-2137f7c6d61b"
id"msg_01ACCUbLnqkftm5jgf24754P"
is_byokfalse
latency1940
model_permaslug"anthropic/claude-sonnet-5-20260630"
provider_name"Amazon Bedrock"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.17.0; linux; x64))"
http_referer(null)
request_id"req-1782891556-5k9rCz3CFTcR7RKn2f6X"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1782891556-FKlpCox3FraIb9JIUOfh"
upstream_id"msg_01ACCUbLnqkftm5jgf24754P"
total_cost0.01434
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"
response_cache_source_id(null)
data_region"global"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences12
wordCounts
05
15
25
35
45
55
65
75
85
95
105
115